Lock for differential gears



Feb. 19., 1924.

, G. BOYDELATOUR Loox FOR DIFFERENTIAL GEARs Fle'd Aug; 9, 1923 PatentedFeb. 19, 1924i.

GEORGE BOYDELA'OUR, OF CANTON, OHIO.

LOCK FOR DIFFERENTIAL GEABS.

Application filed August 9, 1923. Serial No.'656,585.

T all whom t may concern.'

Be it known that I, GEORGE BoYDnLAToUn, a citizen of the United States,residing at Canton, in the county of Stark and State of Ohio, haveinvented certain new and useful Improvements in Locks for DifferentialGears, ot which the following is a specification'.

The invention relates to improvements in differential gear mechanism forself propelled vehicles, and the object of the improvement is to providemeans for locking the differential gears to cause the two live axlesections to rotate as a unit; means being provided for operating thelocking mechanism from a point convenient to the drivers seat.

The above and other objects are attained by constructing the mechanismin the manner illustrated in the accompanying drawing, in Which- Figure1 is a plan sectional view through a differential gear mechanismembodying the invention;

Fig. 2, a side elevation of the differential gear mechanism, the housingbeing shown in section;

Fig. 3, an elevation of the dierential gears and lock with the housingand frame removed;

Fig. 4, a section on the line 4f-4, Fig. 2;

Fig. 5, a plan View of a portion of thedifferential housing showing themeans for operating the lock; and

Fig. 6, a detached, perspective view of the lock.

Similar numerals refer to similar parts throughout the drawing.

The usual rear axle housing is indicated at and the differential housingat 11. The live axles 12 are extended through the axle housing andthrough the bearings 13 in the dierential housing, having the squaredinner ends 14C upon which are lfixed the beveled gears 15 of thedifferential mechanism.

An annular frame 16 is connected to the bearings 13 as by the radialarms 17 and 18 and is provided with an annular flange 19 at one edge, towhich is attached the beveled drive gear 20 of the differentialmechanism, said drive gear meshing with the drive pinion 21.

The beveled pinions 22 are provided with stub shafts 23 journaled in theannular frame 16 and each of' said pinions meshes with both of thebeveled gears 15. rlChe inner ends of the shafts 23 of the beveledpinions are journaled in the ring 24; which, together with the annular:frame 16 and radial arms 17 and 18, forms the driving cage of thedifferential mechanism.

lThis much of the mechanism may be of` usual construction, the inventionresiding in the locking mechanism which includes the locking dogs 25,each of which is provided with the teeth 26 at its ends arranged to meshwith the teeth of the beveled gears 15, and the teeth 27 at its sidesarranged to mesh with the teeth of the beveled pinions 22.

Each of' the locking dogs is provided with the central threaded opening28 mounted upon the screw 29 which is journaled at its inner end in thering 2li, the outer end being extended through the annular portion 16 ofthe cage, the collar 30 preventing longitudinal movement or" the same.

A pinion 31 is mounted upon the outer end of each screw and meshes witha rack bar 32, the rack bars being connected to the sliding ring 33which is mounted around the annular portion 16 of the cage. The ring 33is provided with grooves Se which engage the ribs 35 upon the annularportion 16 of the cage to prevent turning of the ring upon the cage.

r1he ring 33 is provided with an annular groove 36 which receives thestuds 37 upon the yoke 38, the lever 39 being fixed to said yoke andpivoted as at 40 adjacent to a slot 11 in the differential housing, adust cap 4-2 being provided over said slot.

A link is connected to the outer end o1 the lever 39 and at its oppositeend to a bell crank 41, which is pivoted as at 115 to a stationaryportion of the vehicle, a link 46 leading from said bell crank to asuitable lever or pedal located adj'ari'ent to the drvers seat.

Each of the locking dogs is provided with the pins el? arranged to enterthe apertures 4:8 in the cage when `the locking dogs are in the unlockedposition, these pins being for the purpose of holding the dogs inalignment in order that they will mesh properly with the gears.

In operating the vehicle, the dogs are normally held in the unlockedposition, being withdrawn from engagement with the beveledgears andpinion. l/Vhen it is desired to lock the two sections of the axletogether, the lever 39 is operated through the links getherr and causingthomto rotate asa unit.

It will he obvious that. the movement oit the ring 33 in the oppositedirection will,

through the rack hars 22, rotate the pinions 31.., and-with themthescrows 29 in a dire@ tion to withdraw the looking dogs from engageinent with the di'lerentialgearing, .thus permitting the gearing tooperato inthe usual manner.

I' claim :w-

1.,The gearing including gears andpinions meshing with the gears7 oit alooking dog arrangedto mesh with both gears and withtwo of the pinions.

2. The combination with a differential gearingincluding gears undpinions mesh ing with the gears, of :1; locking dog ar.- ranged tomeshwithhoth gears and with twool the pinions, and means for moving thelocking dog into engagement with the gearing.

3. The combination with, a diierential gearing including lgears andpinions mesh? ing withy the gears, of a. locking dog arrangedfto meshwitlrboth gears andl with` combi-nation with a. differential teeth atits ends for engagement with the gears and teeth at its sidesforfengagement with two of the pinions.

The combination with a differential gearing including gears and pinionsmeshing with the gears, of a. locking dog having teetl at its ends 'forengagement with the gears and teethnt its sides for engagement with twoof the pinions7 and means for moving the locking dog into engagementwith the gearing.

6. The combination with a diferenti'al gearing including gears andpinions meshing with the gears, oa locking dog having teeth atV .itsends vfor engagement withthe gears andteeth at its sides 'for engagementwith two oi' the pinions, and a screw `for moving the locking'dog intoengagement withfthe gearing.

T.' The combination with a' diieientialV gearing including gears andpinions` meshv ing with the gears, of a lockingy dog'arrangedV to meshwith both gears andv with twololI the pinions,.n. screw for moving the.lockingdog into engagement with the gearing, a pinion upon the Screw, arack har engaging the inion.andnieans tor sliding the rack bar.

8.-.T2he combination with4 a. di'erent-ial gearing including gears andpinions meshine' with'the gears,l of a. locking dog. ar-

ranged to mesh with both gears and with.

two of the pinions, a screw for mov-ing the: lockingfdog into engagementwith the gearing, a-pinion upon the-screw, wringiupon which the rack baris fixed, and means for; slidin-g'thc ring. A

In testimony that l claim the above,` l have hereunto subscribed myname..

ononen no-YDELATOUR;

